John Lewis Gaddis (born April 2, 1941) is an American military historian, political scientist, and writer. He is the Robert A. Lovett Professor of Military and Naval History at Yale University. He is best known for his work on the Cold War and grand strategy, and he has been hailed as the "Dean of Cold War Historians" by The New York Times. Gaddis is also the official biographer of the prominent 20th-century American diplomat and historian George F. Kennan. George F. Kennan: An American Life (2011), his biography of Kennan, won the 2012 Pulitzer Prize for Biography or Autobiography.
